package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Employee;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServicelmpl implements DishService {
    @Autowired
    private DishMapper dishMapper;//将mapper调用进来

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private SetmealMapper setmealMapper;
    /**
     * 新增菜品和对应的口味
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        //插入1条菜品数据
        Dish dish = new Dish();

        BeanUtils.copyProperties(dishDTO, dish);//将dishDTo的数据拷贝到dish中
        //调用mapper的insert方法,向菜品白表插入1条数据
        dishMapper.insert(dish);
        Long dishId = dish.getId();//获取菜品表的id值，需要在dishmapper.sql语句中添加值。seGeneratedKeys--获取菜品的主键值，将主键值返回给对象的id属性。获取insert语句生成的主键值

        List<DishFlavor> flavors = dishDTO.getFlavors();//将dishDTO里面的口味表拿出来。
        //向口味表插入n条数据

        if(flavors != null && flavors.size() > 0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });

            dishFlavorMapper.insertBatch(flavors);

        }


    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());//第一个是页码数，第二个是一页显示多条
        Page<DishVO> page= dishMapper.pageQuery(dishPageQueryDTO);
        long total = page.getTotal();
        List<DishVO> records = page.getResult();
        return new PageResult(total,records);
    }

    /**
     * 菜品批量删除
     * @param ids
     * @return
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否能够删除--菜品是否存在起售，是，则不能删除
        for(Long id : ids){
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus() ==  StatusConstant.ENABLE){
                //启售中的商品不能删除
                throw  new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }

        }

        //判断当前菜品是否能够删除--菜品是否存某套餐，是，不能删除
         List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
         if(setmealIds != null && setmealIds.size() > 0){
             throw  new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
         }


        //删除菜品表中的菜品数据
        /*
         for(Long id : ids){
             dishMapper.deleteById(id);
             //删除菜品关联的口味数据
             dishFlavorMapper.deleByDishId(id);
         }*/

        //根据菜品id集合批量删除菜品数据
        dishMapper.deleteByIds(ids);

        //口味id集合批量删除口味数据
        dishFlavorMapper.deleteByDishIds(ids);


    }
    /**
     * 根据id查询菜品和对应的口味数据
     * @param id
     * @return
     */


    public DishVO getByIdWithFlavor(Long id){
        //根据菜品id查询菜品数据
        Dish dish = dishMapper.getById(id);
        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        //将查询到的数据进行封装到VO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return  dishVO;
    }

    /**
     * 根据菜品id修改菜品基本信息和对应的口味信息
     * @param dishDTO
     */
    public  void updateWithFlavor(DishDTO dishDTO){

        //修改菜品表基本信息
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);//将dishDTO的数据拷贝到dish上
        dishMapper.update(dish);

        //删除原有的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());//删除单条口味数据
        //插入新的口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() > 0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });

            dishFlavorMapper.insertBatch(flavors);
        }

    }

    /**
     * 菜品起售停售
     * @param status
     * @param id
     */
    public void  startOrStop(Integer status, Long id){
        //根据菜品id查询菜品的基本信息,
        Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .build();
        //修改菜品的状态
        dishMapper.update(dish);

        //如果是停售操作，还需要将包含当前菜品的套餐也停售
        if (status == StatusConstant.DISABLE) {
            // 如果是停售操作，还需要将包含当前菜品的套餐也停售
            List<Long> dishIds = new ArrayList<>();
            dishIds.add(id);
            // select setmeal_id from setmeal_dish where dish_id in (?,?,?) 根据菜品id去找套餐菜品表里面的套餐id，然后江套餐id对应的字段赋值
            List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(dishIds);
            if (setmealIds != null && setmealIds.size() > 0) {
                for (Long setmealId : setmealIds) {
                    Setmeal setmeal = Setmeal.builder()
                            .id(setmealId)
                            .status(StatusConstant.DISABLE)
                            .build();
                    setmealMapper.update(setmeal);
                }
            }
        }
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId){
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);

    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }




}
